The MX-4 is definitely enough for nearly any use case.
But like MeanMachine41 mentioned, I would recommend
Thermal Grizlly Kryonaut or at least Hydronaut if you have not already bought the MX-4. However to be completely honest Thermal Grizzly produces high end thermal pastes but you will probably not notice any difference if you are not fighting for every °C. Your CPU will run approximately 1-2 °C cooler with
Kryonaut then with
MX-4.
Here is a recent video where someone tested different thermal pastes including Kyronaut and MX-4.